PIC32MX420F032H-40V/PT Microchip Technology, PIC32MX420F032H-40V/PT Datasheet - Page 137

• Manufacturer Part Number: PIC32MX420F032H-40V/PT
• Description: 32 KB Flash, 8 KB RAM, USB-OTG, 40 MHz, 10-Bit ADC, DMA 64 TQFP 10x10x1mm TRAY
• Manufacturer: Microchip Technology
• Series: PIC® 32MXr

Specifications of PIC32MX420F032H-40V/PT

• Processor Series: PIC32MX4xx
• Core: MIPS
• Data Bus Width: 32 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 8 KB
• Interface Type: USB, I2C, UART, RS-232, RS-485, SPI
• Maximum Clock Frequency: 80 MHz
• Number Of Programmable I/os: 5
• Number Of Timers: 5
• Operating Supply Voltage: 2.3 V to 3.6 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-64
• Operating Temperature Range: - 40 C to + 105 C
• Supply Current (max): 10 mA
• Core Processor: MIPS32® M4K™
• Core Size: 32-Bit
• Speed: 40MHz
• Connectivity: I²C, IrDA, LIN, PMP, SPI, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Eeprom Size: -
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Lead Free Status / Rohs Status: Details

26.2
This section describes the operation of the WDT and
Power-Up Timer of the PIC32MX3XX/4XX.
The WDT, when enabled, operates from the internal
Low-Power Oscillator (LPRC) clock source and can be
used to detect system software malfunctions by reset-
ting the device if the WDT is not cleared periodically in
software. Various WDT time-out periods can be
selected using the WDT postscaler. The WDT can also
be used to wake the device from Sleep or Idle mode.
The following are some of the key features of the WDT
module:
• Configuration or software controlled
• User-configurable time-out period
• Can wake the device from Sleep or Idle
FIGURE 26-1:
© 2011 Microchip Technology Inc.
WDTCLR = 1
WDT Enable
WDT Enable
Reset Event
Watchdog Timer (WDT)
PWRT Enable
Oscillator
WDT Enable
LPRC
Wake
WATCHDOG AND POWER-UP TIMER BLOCK DIAGRAM
WDT Counter Reset
Clock
25-bit Counter
FWDTPS<4:0>(DEVCFG1<20:16>)
1:64 Output
25
PIC32MX3XX/4XX
1
Decoder
PWRT Enable
Power Save
0
1
Control
PWRT
LPRC
Device Reset
NMI (Wake-up)
DS61143H-page 137